Georeferencing processing time and efficiency (Python script)

[VictorGay]

Hi everybody,

When I georeference a tif or jpg image on ArcMaps by loading the link table with a dozen control points, the transformation takes a second or two.

However, when I run the Python script using WarpFromFile, it takes around 10 minutes. Here is my code:

arcpy.WarpFromFile_management(input.jpg, output.tif, link_table.txt, POLYORDER1, NEAREST)

Is there any reason for that? e.g. I input a jpg and the output is a tif, perhaps this slows down the process.

Any idea on how to improve the efficiency?

Thanks

[XanderBakker · Accepted solution]

Georeferencing will only apply the control points to the raster and change the visualization. Updating the georeference will only change the worldfile and not the actual raster.

When you warp a raster a new output raster is created. Depending the type of resampling method the time can increase even more.

[VictorGay]

I see, so it's the rectification that takes some time by generating a new output raster.

Thanks